Syntheses, structures, and luminescence properties of five new coordination polymers based on 3-carboxy-1-(3′-carboxybenzyl)-2-oxidopyridinium and neutral ligands

A series of coordination polymers, namely [Zn(μ 3 -L)(H 2 O) 2 ] ( 1 ), [Zn(μ 2 -L)(2,2′-bpy)(H 2 O)] ( 2 ), [Zn(μ 3 -L)(μ 2 -4,4′-bpy) 0.5 ] ( 3 ), [Cd(μ 3 -L)(2,2′-bpy)] ( 4 ), and [Cd(μ 2 -L)(phen)(H 2 O)] ( 5 ) (H 2 L = 3-carboxy-1-(3′-carboxybenzyl)-2-oxidopyridinium, 2,2′-bpy = 2,2′-bipyridine...

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Bibliographic Details
Published in:CrystEngComm 2022-10, Vol.24 (38), p.6715-6723
Main Authors: He, Yuan-Chun, Wu, Shuang, Zhang, Jie, Qin, Wen-Hui, Liu, Jing, Zhao, Fang-Hua, Liu, Lin, Jing, Zhihong
Format: Article
Language:English
Subjects:
Chemical bonds
Coordination polymers
Crystal structure
Crystals
Ferric ions
Hydrogen bonds
Infrared analysis
Ligands
Luminescence
Molecular chains
Optical properties
Polymers
Self-assembly
Single crystals
Stacking
Structural analysis
Supramolecular frameworks
Thermogravimetric analysis
X ray powder diffraction
X-ray diffraction
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Summary:A series of coordination polymers, namely [Zn(μ 3 -L)(H 2 O) 2 ] ( 1 ), [Zn(μ 2 -L)(2,2′-bpy)(H 2 O)] ( 2 ), [Zn(μ 3 -L)(μ 2 -4,4′-bpy) 0.5 ] ( 3 ), [Cd(μ 3 -L)(2,2′-bpy)] ( 4 ), and [Cd(μ 2 -L)(phen)(H 2 O)] ( 5 ) (H 2 L = 3-carboxy-1-(3′-carboxybenzyl)-2-oxidopyridinium, 2,2′-bpy = 2,2′-bipyridine, 4,4′-bpy = 4,4′-bipyridine, phen = 1,10-phenanthroline), have been synthesized under hydrothermal conditions. These coordination polymers have been characterized by single-crystal X-ray diffraction, elemental analyses, infrared spectroscopy, thermogravimetric analyses and powder X-ray diffraction. The structure analysis by single crystal X-ray diffraction reveals that compound 1 shows a 1D double chain which can be expanded to a 2D supramolecular architecture through intermolecular π-π stacking interactions. In compound 2 , the 1D wave-like chains are extended to a 3D supramolecular framework by intermolecular hydrogen bonds and π-π stacking interactions. In compound 3 , the infinite rod-like metal ion chains are linked with L 2− anions and 4,4′-bpy to form a 3D framework. In compound 4 , the adjacent 1D loop-like chains are interconnected to a 3D supramolecular framework by intermolecular hydrogen bonds and π-π stacking interactions. Compound 5 displays a 3D supramolecular architecture extended from the 1D zigzag chains by intermolecular hydrogen bonds and π-π stacking interactions. The result reveals that the organic ligand plays a key role in the self-assembly of coordination polymers. The luminescence sensing experiments reveal that compounds 1-5 can effectively detect Fe 3+ , Cr 2 O 7 2− , and NB. In particular, compound 1 shows a high quenching constant and a low limit of detection for Fe 3+ . Five CPs have been synthesized by a new semi-rigid dicarboxyl ligand and neutral ligands under hydrothermal conditions, and their luminescent sensing experiments for different small molecules/ions were studied in detail.
ISSN:1466-8033
1466-8033
DOI:10.1039/d2ce00921h